There is the incredibly small chance that Salina and Desch were name dropped not just for flavor, but to remind us that Syrcus Tower was
also sealed with the intent of being utilized at some unspecified future date. Assuming the Onishishu aren't attempting to prevent calamities in general, but a
very specific calamity, that Salina had some anticipatory knowledge of...
Then the entire thing goes from being more of that special brand of Allagan non-help we keep getting every single time they've gotten "directly" involved, to being very deliberate foreshadowing of a future story arc, perhaps the one Yoshida intends to start after we wrap up this Hydaelyn/Zodiark business.
"But the tower is too much for us to handle. That's why we sealed it."
That's also why Nero is helping out with the Omega problem.

Originally Posted by
Nero
Garlond...
...The next round is yours.
But you can't keep holding back... It's time to unfetter that brilliant mind of yours. To do what must be done.
And I'm not just talking about what becomes of Omega.
You cannot preach “Freedom through Technology” and keep yourself locked up in chains...
Assuming Nero can get through to Cid, there's also the matter of the scanner Unei updated, which is still lying around Mor Dhona somewhere, doing absolutely nothing for the Eureka storyline it was initially speculated to connect to.